Herbicidal compositions and method of using the same

Abstract

Herbicidal compositions containing as the active ingredients (one or more compounds selected from among light-induced herbicidal compounds and one or more compounds selected from among organoposphorus herbicidal compounds, characterized by containing ethylenediamine alkoxylates and alcohol alkoxylates as surfactants. These herbicidal compositions have an excellent rapid action and exert a remarkable herbicidal effect in a small dose.

What is claimed is:  
     
       1. A herbicidal composition containing one or more compounds selected from light-induced herbicidal compounds and one or more compounds selected from organophosphorus herbicidal compounds as active ingredients thereof, characterized by containing an ethylenediamine alkoxylate and an alcohol alkoxylate as surfactants. 
     
     
       2. A herbicidal composition according to  claim 1 , wherein said light-induced herbicidal compound is a compound represented by the following general formula (I): 
       
         
           P—Q  (I)  
         
       
       wherein P represents any one of P 1  to P 9 :                  
                   
       wherein X 1 , Y, Y 1 , Y 2 , R 3 , R 4 , R 5  and R 6  are as defined later, and Q represents any one of Q 1  to Q 11 :                  
                   
       wherein R 1  represents a (C 1 -C 6 ) alkyl group; R 2  represents a hydrogen atom, a (C 1 -C 6 ) alkyl group or a halo (C 1 -C 6 ) alkyl group; R 3  represents a (C 1 -C 6 ) alkyl group, a halo (C 1 -C 6 ) alkyl group, a (C 3 -C 6 ) cycloalkyl group, a (C 2 -C 6 ) alkenyl group or a (C 2 -C 6 ) alkynyl group; R 4  represents a hydrogen atom or a (C 1 -C 6 ) alkyl group; R 5  represents a hydrogen atom, a (C 1 -C 6 ) alkyl group, a halo (C 1 -C 6 ) alkyl group, a (C 2 -C 6 ) alkenyl group or a (C 2 -C 6 ) alkynyl group; R 6  represents a (C 1 -C 6 ) alkyl group, a (C 2 -C 6 ) alkenyl group or a (C 2 -C 6 ) alkynyl group; X 1  and X 2  represent halogen atoms which may be the same or different; Y represents —O—, —S—, —SO— or —SO 2 —; Y 1  represents —O— or —S—; Y 2  represents —O—, —S— or —NH—; and n represents an integer of 0 to 1. 
     
     
       3. A herbicidal composition according to  claim 1 , wherein said light-induced herbicidal compound is one or more compounds selected from the substituted phenylpyrazole derivatives represented by the following general formula (I-1):                    
       wherein R represents —Y 1 —R 3  (wherein R 3  represents a (C 1 -C 6 ) alkyl group, a halo (C 1 -C 6 ) alkyl group, a (C 2 —C 6 ) alkenyl group or a (C 2 -C 6 ) alkynyl group and Y 1  represents —O— or —S—), —Y 2 CH(R 4 )CO—OR 5  (wherein R 4  represents a hydrogen atom or a (C 1 -C 6 ) alkyl group, R 5  represents a hydrogen atom, a (C 1 -C 6 ) alkyl group, a halo (C 1 -C 6 ) alkyl group, a (C 2 -C 6 ) alkenyl group or a (C 2 —C 6 ) alkynyl group, and Y 2  represents —O—, —S— or —NH—), —COOCH(R 4 )CO—Y 1 —R 5  (wherein R 4 , R 5  and Y 1  are as defined above) or —COOR 6  (wherein R 6  represents a (C 1 -C 6 ) alkyl group, a (C 2 -C 6 ) alkenyl group or a (C 2 -C 6 ) alkynyl group); R 1  represents a (C 1 -C 6 ) alkyl group; R 2  represents a hydrogen atom, a (C 1 -C 6 ) alkyl group or a halo (C 1 -C 6 ) alkyl group; X 1  and X 2  represent halogen atoms which may be the same or different; Y represents —O—, —S—, —SO— or —SO 2 —; and n represents an integer of 0 to 1. 
     
     
       4. A herbicidal composition according to  claim 1 , wherein said organophosphorus herbicidal compound is N-(phosphonomethyl)glycine or a salt thereof, 4-[hydroxy(methyl)phosphino]-DL-homoalanine or a salt thereof, or 4-[hydroxy(methyl)phosphino]-L-homoalanyl-L-alanyl-L-alanine or a salt thereof. 
     
     
       5. A herbicidal composition according to  claim 1 , wherein said ethylenediamine alkoxylate is one or more compounds selected from the compounds represented by the following general formula (II):                    
       wherein EO represents —O—CH 2 CH 2 —; PO represents —O—CH(CH 3 )CH 2 —; E′O represents —CH 2 CH 2 —O—; P′O represents —CH 2 (CH 3 )CH—O—; and a, b, d, e, f, g, h and i represent integers of 1 to 20 which may be the same or different. 
     
     
       6. A herbicidal composition according to  claim 5 , wherein said ethylenediamine alkoxylate is an adduct of ethylenediamine and polyoxyethylene, an adduct of ethylenediamine and polyoxypropylene or an adduct of ethylenediamine and a polyoxyethylene-polyoxypropylene copolymer. 
     
     
       7. A herbicidal composition according to  claim 1 , wherein said alcohol alkoxylate is one or more compounds selected from the compounds represented by the following general formula (III): 
       
         
           C k H 2k+1 —(EO) j (PO) l —OH  (III)  
         
       
       wherein EO represents —O—CH 2 CH 2 —; PO represents —O—CH(CH 3 )CH 2 —; and j, k and l represent zero or integers of 1 to 20 which may be the same or different, provided that both of j and l do not indicate zero at the same time. 
     
     
       8. A herbicidal composition according to  claim 7 , wherein said alcohol alkoxylate is a mixture of one or more compounds selected from the group consisting of primary alcohol ethoxylate, primary alcohol propoxylate, primary alcohol ethoxylate propoxylate, secondary alcohol ethoxylate, secondary alcohol propoxylate, secondary alcohol ethoxylate propoxylate, tertiary alcohol ethoxylate, tertiary alcohol propoxylate and tertiary alcohol ethoxylate propoxylate. 
     
     
       9. A herbicidal composition according to  claim 1 , which contains one or more compounds selected from light-induced herbicidal compounds in an amount of 0.01-10 parts by weight, an organophosphorus herbicidal compound in an amount of 1-60 parts by weight, an ethylenediamine alkylate in an amount of 0.1-25 parts by weight and an alcohol alkoxylate in an amount of 0.1-15 parts by weight, all per 100 parts by weight of the herbicidal composition. 
     
     
       10. A herbicidal composition according to  claim 1 , wherein said herbicidal composition is a suspension concentrate, a water dispersible granule or an aqueous preparation. 
     
     
       11. A method for using a herbicidal composition characterized by treating the objective weed or the soil with an effective amount of the herbicidal composition according to  claim 1  for the purpose of controlling the weeds harmful to crop plants.